function getMonthsBetween2Dates(date1 : Date, date2 : Date) : number {
return date2.getMonth() - date1.getMonth() + 12 * (date2.getFullYear() - date1.getFullYear());
}
console.log(getMonthsBetween2Dates(new Date('2022-01-7'), new Date('2022-8-17')));
/*
run:
7
*/